/*

This file is part of Ext JS 4

Copyright (c) 2011 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial Software License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department at http://www.sencha.com/contact.

*/
Ext.define('FV.controller.Feeds', {
    extend: 'Ext.app.Controller',

    stores: ['Feeds', 'Articles'],
    models: ['Feed'],
    views: ['feed.Add'],
    
    refs: [
        {ref: 'feedList', selector: 'feedlist'},
        {ref: 'feedData', selector: 'feedlist dataview'},
        {ref: 'feedShow', selector: 'feedshow'},
        {ref: 'feedForm', selector: 'feedwindow form'},
        {ref: 'feedCombo', selector: 'feedwindow combobox'},
        {ref: 'articleGrid', selector: 'articlegrid'},
        {
            ref: 'feedWindow', 
            selector: 'feedwindow', 
            autoCreate: true,
            xtype: 'feedwindow'
        }
    ],
    
    requires: ['FV.lib.FeedValidator'],

    // At this point things haven't rendered yet since init gets called on controllers before the launch function
    // is executed on the Application
    init: function() {
        this.control({
            'feedlist dataview': {
                selectionchange: this.loadFeed
            },
            'feedlist button[action=add]': {
                click: this.addFeed
            },
            'feedlist button[action=remove]': {
                click: this.removeFeed
            },
            'feedwindow button[action=create]': {
                click: this.createFeed
            }
        });
    },
    
    onLaunch: function() {
        var dataview = this.getFeedData(),
            store = this.getFeedsStore();
            
        dataview.bindStore(store);
        dataview.getSelectionModel().select(store.getAt(0));
    },
    
    /**
     * Loads the given feed into the viewer
     * @param {FV.model.feed} feed The feed to load
     */
    loadFeed: function(selModel, selected) {
        var grid = this.getArticleGrid(),
            store = this.getArticlesStore(),
            feed = selected[0];

        if (feed) {
            grid.enable();
            store.load({
                params: {
                    feed: feed.get('url')
                }
            });            
        }
    },
    
    /**
     * Shows the add feed dialog window
     */
    addFeed: function() {
        this.getFeedWindow().show();
    },
    
    /**
     * Removes the given feed from the Feeds store
     * @param {FV.model.Feed} feed The feed to remove
     */
    removeFeed: function() {
        this.getFeedsStore().remove(this.getFeedData().getSelectionModel().getSelection()[0]);
    },
    
    /**
     * @private
     * Creates a new feed in the store based on a given url. First validates that the feed is well formed
     * using FV.lib.FeedValidator.
     * @param {String} name The name of the Feed to create
     * @param {String} url The url of the Feed to create
     */
    createFeed: function() {
        var win   = this.getFeedWindow(),
            form  = this.getFeedForm(),
            combo = this.getFeedCombo(),
            store = this.getFeedsStore(),
            feed  = this.getFeedModel().create({
                name: combo.getDisplayValue(),
                url: combo.getValue()
            });

        form.setLoading({
            msg: 'Validating feed...'
        });
        
        FV.lib.FeedValidator.validate(feed, {
            success: function() {
                store.add(feed);
                form.setLoading(false);
                win.hide();
            },
            failure: function() {
                form.setLoading(false);
                form.down('[name=feed]').markInvalid('The URL specified is not a valid RSS2 feed.');
            }
        });
    }
});
